Daikin VRV IV+ Service Manual page 362

4 | Third party components
To perform a communication reset
Service manual
362
NOTICE
If an indoor unit and/or branch selector box is/are powered OFF when
communication reset is performed, the outdoor unit will delete the indoor unit/
branch selector box information since this/these unit will not be identified during re-
initialization. If a branch selector box is Power OFF, all the indoor units connected to
the branch selector box will not be identified no matter if they have power or not. If
so, these units will not be recognized by the outdoor unit upon power restore to this
indoor unit.
1 Set multimeter to V DC measurement. The example below is performed while
COM-F1 and V DC-F2, the polarity will be opposite than the graph below if
connected otherwise (which is not a problem).
y
a
b
16 VDC
-16 VDC
a Y: Voltage (VDC)
b X: Time
c
1 Terminal F1
3 Terminal F2
5 7-segment display
Push button BS3
e
f
c d
d
a b
x
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05